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Plasmonic Au Nanoparticle@Ti3C2T Heterostructures for Improved Oxygen Evolution Performance.

Jin Wang1, Xiaoqing Wei1, Xunyue Wang1

  • 1Nantong Key Laboratory of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China.

Inorganic Chemistry
|March 31, 2021
PubMed
Summary

This study introduces gold nanoparticles on MXene Ti3C2Tx nanosheets for enhanced oxygen evolution reaction (OER) catalysis. The novel Au NPs@Ti3C2Tx material shows a significant 2.5-fold increase in catalytic activity.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Catalysis

Background:

  • Plasmonic-enhanced heterogeneous catalysis utilizes hot carriers from nanostructured metals to accelerate reaction rates.
  • Oxygen evolution reaction (OER) is crucial for energy conversion but requires efficient catalytic systems.

Purpose of the Study:

  • To design and investigate gold nanoparticles on MXene Ti3C2Tx nanosheets (Au NPs@Ti3C2Tx) for improved OER performance.
  • To explore the tunability of OER catalysis by varying gold nanoparticle (Au NP) concentration and size.

Main Methods:

  • Fabrication of well-defined heterostructures of Au NPs on Ti3C2Tx nanosheets.
  • Systematic investigation of catalytic performance by varying Au NP characteristics.
  • Analysis of OER activity through electrochemical measurements.

Main Results:

  • Au NPs@Ti3C2Tx heterostructures demonstrated tunable catalysis performance.
  • A 2.5-fold increase in oxidation/reduction current was observed for Au NPs@Ti3C2Tx compared to pure Ti3C2Tx.
  • Optimal performance was achieved with Au NPs around 10 nm in diameter.

Conclusions:

  • The enhanced OER performance is attributed to the synergistic effects of plasmonic hot hole injection and Schottky junction carrier trapping.
  • The facile fabrication and tunable nature of Au NPs@Ti3C2Tx offer a promising platform for designing advanced MXene-based heterostructures.
  • This work lays the foundation for developing highly efficient OER catalysts for energy applications.